Is Outlook the default mail application? Because in that case you can use the mailto:// schema and open a URL. The OS will handle calling the app that is the default mail handler.
so, rather than forcing outlook to open and compose a message directly from IronPython, I’ve decided a better course of action is to direct people to an MS Form from the pushbutton. The information from the form response is then pushed to through an automated flow (via Power Automate) to create the Outlook message.
Instead of creating a whole new thread, I decided to revise this one. I have tried everything mentioned in this thread and they only thing I have managed to accomplish is to open a second instance of Outlook. @ronjr811 I am leaning with you and just handling this through MS Forms and having those requests sent to a MS Teams Team/Channel.